Question

In: Biology

Build a Punnett square to represent each junction. Indicate gamete proportions, progeny proportions (each table) and...

Build a Punnett square to represent each junction. Indicate gamete proportions, progeny proportions (each table) and summarize phenotypes.

a. BBMM X BrMm

b. BrMm X BrMm

c. BrMm X rrmm

Expert Solution

	BM	BM	BM	BM
BM	BBMM	BBMM	BBMM	BBMM
Bb	BBMb	BBMb	BBMb	BBMb
rM	BrMM	BrMM	BrMM	BrMM
rb	BrMb	BrMb	BrMb	BrMb

This punnet square represents BBMM x BrMm

4 genotype present BrMm

4 phenotype BrMM

The Punnett square is a square diagram that is used to predict the genotypes of a particular cross or breeding experiment. It is named after Reginald C. Punnett, who devised the approach. The diagram is used by biologists to determine the probability of an offspring having a particular genotype

b))BrMm x BrMm

	BM	Bm	rM	rm
BM	BBMM	BBmM	rBMM	rBmM
Bm	BBMm	BBmm	rBMm	rBmm
rM	BrMM	BrmM	rrMM	rrmM
rm	BrMm	Brmm	rrMm	rrmm

2 trait cross
16 squares
9 unique allele combinations

Genotype	Count	Percent
rBmM	4	25
BBmM	2	12.5
rBMM	2	12.5
rBmm	2	12.5
rrmM	2	12.5
BBMM	1	6.3
BBmm	1	6.3
rrMM	1	6.3
rrmm	1	6.3

C))BrMm x rrmm

	BM	Bm	rM	rm
rm	BrMm	Brmm	rrMm	rrmm
rm	BrMm	Brmm	rrMm	rrmm
rm	BrMm	Brmm	rrMm	rrmm
rm	BrMm	Brmm	rrMm	rrmm

4 unique allele combination

4 nos BrMm, 4 Brmm,4 rrMm,4 rrmm are the genotypes

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